18QHTF21-21.885-PD

Oscillators Overview

The 18QHTF21-21.885-PD is a standard XO (Crystal Oscillator) manufactured by Mercury Electronics Ind. Co. Ltd. It operates at a frequency of 21.885 MHz with an LVCMOS output logic level. The device requires a supply voltage of 1.8V and features a power-down function for standby mode control. It utilizes a 4-SMD, No Lead package with dimensions of 0.079 inches in length and 0.063 inches in width.

Oscillators Feature Summary

• Supports low-voltage operation at 1.8V
• Includes power-down capability for energy efficiency
• Provides LVCMOS output signal compatibility

Oscillators Applications

• Digital clock generation in embedded systems
• Timing reference for microcontrollers
• Data communication interface synchronization

Oscillators Procurement Notes

Verify the specific frequency tolerance and load capacitance requirements against the target circuit design before procurement. Confirm that the 1.8V supply rail is stable within the operational specifications. Ensure the PCB footprint matches the 4-SMD no-lead package dimensions to prevent assembly issues. Check for any specific handling instructions regarding electrostatic discharge protection during installation.

Oscillators Selection Notes

Select this component when a precise 21.885 MHz timing source is required for low-power applications. The integrated power-down feature makes it suitable for battery-operated devices where standby current reduction is critical. Ensure the host system supports LVCMOS logic levels for direct interfacing without additional buffering. Consider the physical size constraints as the package is compact.

Oscillators Part Context

This oscillator belongs to the Mercury Electronics surface-mount crystal oscillator family designed for high-frequency stability. The 'PD' suffix indicates the inclusion of a power-down pin or function, allowing the device to be disabled when not in use. This series is engineered for compact electronic designs requiring reliable clock signals in minimal space.

Oscillators Replacement Considerations

Direct substitutes must match the 21.885 MHz frequency, 1.8V supply, LVCMOS output, and 4-SMD package. Verify that alternative components support the same power-down functionality. Cross-reference pinout configurations to ensure compatibility with existing PCB layouts.